A coalition of CEGEP student associations is asking the CAQ government to rethink the 'third link' project

Students and citizens marched along Grande Allée on Saturday afternoon to oppose the construction of a third bridge or tunnel in the Quebec City region. (Marc-André Turgeon/Radio-Canada)

A coalition of CEGEP student associations in the Quebec City region is asking the Coalition Avenir Quebec government to study the environmental impact of a third infrastructure project crossing the St. Lawrence River.

A 2016 feasibility study estimated that maintenance of a 7.8-kilometre tunnel under the St. Lawrence would cost $2.3 billion over the next century, in addition to the construction costs of $4 billion. (Graph Synergie)

The march came in the midst of a string of rallies across Quebec on Saturday asking the CAQ to put in place policies respecting the environment.

"When he was first elected, François Legault said the environment was a priority for him, this is his chance to prove it," said Veilleux.

People gathered to voice that sentiment in Montreal, Trois-Rivières and a dozen other municipalities across Quebec this weekend.

Earlier this week, 500 prominent Quebecers — including artists, businesspeople and researchers — signed their names to a document to pledge action on climate change, called Le Pacte pour la Transition, outlining a number of measures they commit to making as individuals to reduce carbon emissions.